Incubation time vs. temperature. This waiting time was determined by electrical resistivity. It was found that incubation time diverges near T0. The solid line shows calculated incubation time derived from the Kakeshita method.
Hiroshi ABE and Ken-ichi OHSHIMA1
Department of Materials Science and Engineering, National Defense Academy, Yokosuka 239-0811
1Institute of Applied Physics, University of Tsukuba, Tsukuba 305-8573
Systematic measurement of waiting time was performed in metallic sodium, whose transform temperature, Ms, is 32 K. This waiting time appeared above Ms at fixed temperature and became longer with increasing temperature. Experimental results were explained qualitatively by the Kakeshita model, although metallic sodium is conventionally classified as athermal martensite; usually athermal martensite is only a function of temperature.
Keywords: martensitic transformation, kinetics, athermal kinetics, incubation
time, Boltzmann factor
|
Fig.1
Incubation time vs. temperature. This waiting time was determined by electrical resistivity. It was found that incubation time diverges near T0. The solid line shows calculated incubation time derived from the Kakeshita method. |
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